Company proposing nuclear power facility in Kansas plans stock offering
Deep Fission Inc., which is developing an underground Gravity Reactor in Parsons, Kansas, plans an IPO of 2.5 million shares to raise more than $40 million, according to an SEC filing. It previously targeted about 6 million shares at $24–$26, but revised the offering to $16–$18. The company seeks Nasdaq listing under FISN and says its reactor is unproven; it drilled its first well and plans NRC licensing in early 2027.
How this was made

The 30-second read
Why it matters
The SEC filing is a concrete financing update: it reduces the offering size and lowers the expected price range, while reiterating high technical/regulatory failure risk and a conditional Nasdaq listing.
Market read
Traders get a fresh, tradable datapoint on IPO structure (shares and $16–$18 range) and the conditionality around Nasdaq approval for FISN.
What to watch
Nasdaq approval timing and subsequent NRC commercial licensing application (early 2027) may dominate valuation more than the initial IPO terms.
Background
Deep Fission is developing an underground “Gravity Reactor” in Parsons, Kansas, with DOE partnership and community controversy.
Ticker impact
Deep Fission filed with the SEC to cut its IPO size and price range and plans to list on Nasdaq under FISN.
Likely modest volatility around IPO mechanics and any Nasdaq approval/updates; direction depends on investor reception to the lower price range.
The article discloses fresh SEC registration details (share count and $16–$18 range) and a conditional Nasdaq listing, both of which can affect perceived valuation and timing risk.
Market effects
Highlights capital-market funding dynamics for advanced nuclear startups and the market’s sensitivity to unproven reactor risk.
Parsons, Kansas controversy may influence permitting/community acceptance timelines, indirectly affecting project financing risk.
US DOE-linked nuclear development continues to attract private capital, but regulatory and technical uncertainty remains a key cross-border investor theme.
Counterpoint
Lower IPO price range could be interpreted as a pragmatic adjustment to demand rather than a deterioration in fundamentals, potentially improving odds of successful capital raise.
Key entities
- companyDeep Fission Inc.
Company building an underground nuclear reactor in Parsons and planning an IPO on Nasdaq.
- regulatorU.S. Securities and Exchange Commission
Received the company’s registration information reflecting revised IPO terms.
- exchangeNasdaq
Listing approval is required for the offering to proceed.
- regulatorU.S. Nuclear Regulatory Commission
Commercial license application expected in early 2027.
- government agencyU.S. Department of Energy
Partnered with Deep Fission on the Gravity Reactor project.


